---
gcc/pdbout.c | 151 ++++++++++++++++++++++++++++++++++++++++++++++++++-
gcc/pdbout.h | 1 +
2 files changed, 151 insertions(+), 1 deletion(-)
diff --git a/gcc/pdbout.c b/gcc/pdbout.c
index 3d15c620db5..d9ad659cd9a 100644
--- a/gcc/pdbout.c
+++ b/gcc/pdbout.c
@@ -84,7 +84,7 @@ static struct pdb_type *arglist_types = NULL;
static struct pdb_type *pointer_types = NULL;
static struct pdb_type *proc_types = NULL;
static struct pdb_type *modifier_types = NULL;
-static struct pdb_type *fieldlist_types = NULL;
+static struct pdb_type *fieldlist_types = NULL, *last_fieldlist_type = NULL;
static struct pdb_type *struct_types = NULL, *last_struct_type = NULL;
static struct pdb_type *enum_types = NULL;
static struct pdb_type *bitfield_types = NULL;
@@ -911,6 +911,10 @@ write_fieldlist (struct pdb_fieldlist *fl)
len += strlen (fl->entries[i].name);
break;
+
+ case LF_INDEX:
+ len += 6;
+ break;
}
if (len % 4 != 0)
@@ -1055,6 +1059,12 @@ write_fieldlist (struct pdb_fieldlist *fl)
break;
}
+
+ case LF_INDEX:
+ fprintf (asm_out_file, "\t.short\t0\n"); // padding
+ fprintf (asm_out_file, "\t.short\t0x%x\n", fl->entries[i].type->id);
+ fprintf (asm_out_file, "\t.short\t0\n"); // padding
+ break;
}
}
}
@@ -1753,6 +1763,141 @@ number_types (void)
}
}
+/* The maximum length for a type entry is 0xffff. If we have a fieldlist
+ * which would be more than that we need to split it, adding an LF_INDEX
+ * entry to point to the continuation entry. */
+static void
+split_large_fieldlists ()
+{
+ struct pdb_type *t = types;
+ struct pdb_type *prev = NULL;
+
+ while (t)
+ {
+ struct pdb_fieldlist *fl;
+ unsigned int len, max_len;
+ bool made_split = false;
+
+ if (t->cv_type != LF_FIELDLIST || !t->used)
+ {
+ prev = t;
+ t = t->next;
+ continue;
+ }
+
+ fl = (struct pdb_fieldlist *) t->data;
+
+ /* Maximum length of 0xffff, minus 8 bytes for the LF_INDEX we might
+ * need to add, rounded down to multiple of 4. */
+ max_len = 0xfff4;
+ len = sizeof (uint16_t) + sizeof (uint16_t); // length + LF_FIELDLIST
+
+ for (int i = fl->count - 1; i >= 0; i--) {
+ unsigned int delta;
+
+ delta = 2; // LF_MEMBER, LF_ENUMERATE, or LF_INDEX
+
+ switch (fl->entries[i].cv_type) {
+ case LF_MEMBER:
+ delta += 9;
+ break;
+
+ case LF_ENUMERATE:
+ delta += 5;
+
+ /* Positive values less than 0x8000 are stored as they are;
+ * otherwise we prepend two bytes describing what type it is. */
+
+ if (fl->entries[i].value >= 0x8000 || fl->entries[i].value < 0)
+ {
+ if (fl->entries[i].value >= -127 && fl->entries[i].value < 0)
+ delta++; // LF_CHAR
+ else if (fl->entries[i].value >= -0x7fff &&
+ fl->entries[i].value <= 0x7fff)
+ {
+ delta += 2; // LF_SHORT
+ }
+ else if (fl->entries[i].value >= 0x8000 &&
+ fl->entries[i].value <= 0xffff)
+ {
+ delta += 2; // LF_USHORT
+ }
+ else if (fl->entries[i].value >= -0x7fffffff &&
+ fl->entries[i].value <= 0x7fffffff)
+ {
+ delta += 4; // LF_LONG
+ }
+ else if (fl->entries[i].value >= 0x80000000 &&
+ fl->entries[i].value <= 0xffffffff)
+ {
+ delta += 4; // LF_ULONG
+ }
+ else
+ delta += 8; // LF_QUADWORD or LF_UQUADWORD
+ }
+ break;
+
+ case LF_INDEX:
+ delta += 6;
+ break;
+ }
+
+ if (fl->entries[i].name)
+ delta += strlen (fl->entries[i].name);
+
+ if (delta % 4 != 0)
+ delta += 4 - (delta % 4);
+
+ if (len + delta > max_len)
+ {
+ struct pdb_type *t2;
+ struct pdb_fieldlist *fl2;
+ unsigned int num_entries = fl->count - i - 1;
+
+ t2 =
+ (struct pdb_type *) xmalloc (offsetof (struct pdb_type, data) +
+ offsetof (struct pdb_fieldlist, entries) +
+ (num_entries * sizeof (struct pdb_fieldlist_entry)));
+ t2->cv_type = LF_FIELDLIST;
+ t2->next = t;
+ t2->tree = NULL;
+ t2->used = true;
+ t2->id = 0;
+
+ if (prev)
+ prev->next = t2;
+ else
+ types = t2;
+
+ fl2 = (struct pdb_fieldlist *) t2->data;
+ fl2->count = num_entries;
+
+ memcpy (fl2->entries, &fl->entries[i + 1],
+ sizeof (struct pdb_fieldlist_entry) * num_entries);
+
+ fl->entries[i + 1].cv_type = LF_INDEX;
+ fl->entries[i + 1].type = t2;
+ fl->entries[i + 1].name = NULL;
+
+ fl->count = i + 2;
+
+ made_split = true;
+ prev = t2;
+
+ break;
+ }
+
+ len += delta;
+ }
+
+ if (made_split) // might need to be split again
+ continue;
+
+ prev = t;
+ t = t->next;
+ }
+}
+
/* We've finished compilation - output the .debug$S and .debug$T sections
* to the asm file. */
static void
@@ -1760,6 +1905,8 @@ pdbout_finish (const char *filename ATTRIBUTE_UNUSED)
{
mark_referenced_types_used ();
+ split_large_fieldlists ();
+
number_types ();
write_pdb_section ();
@@ -2494,6 +2641,8 @@ add_type_fieldlist (struct pdb_type *t)
else
fieldlist_types = t;
+ last_fieldlist_type = t;
+
if (last_type)
last_type->next = t;
else
diff --git a/gcc/pdbout.h b/gcc/pdbout.h
index 5390fdb0f95..f1b21fe23a0 100644
--- a/gcc/pdbout.h
+++ b/gcc/pdbout.h
@@ -38,6 +38,7 @@
#define LF_ARGLIST 0x1201
#define LF_FIELDLIST 0x1203
#define LF_BITFIELD 0x1205
+#define LF_INDEX 0x1404
#define LF_ENUMERATE 0x1502
#define LF_ARRAY 0x1503
#define LF_CLASS 0x1504
--
2.26.2
